Atoll 3.5
Atoll 3.5 supports a staggering library of propagation models, but four stand out:
| Model | Best Use Case | Frequency Range | | :--- | :--- | :--- | | Standard Propagation Model (SPM) | General macro-cell (calibrated) | 150 – 3500 MHz | | ITU-R P.526 | Diffraction (hilly terrain) | Any | | WINNER II | 4G MIMO/ Small cells | 2 – 6 GHz | | COST 231 Hata | Legacy urban/Suburban | 1500 – 2000 MHz |
Note: Atoll 3.5 was the last version to fully support the "Legacy Wallisch-Ikegami" model before it was deprecated.
Atoll 3.5 represents a mature, stable generation of Forsk’s (now a part of Teoco) market-leading radio planning software. While newer versions exist, Atoll 3.5 remains the industry workhorse for many operators and integrators due to its reliability, lower hardware requirements, and proven workflows. atoll 3.5
This write-up provides a concise, actionable guide to leveraging the core strengths of Atoll 3.5 for multi-technology (2G/3G/4G/5G) network design.
The Atoll 3.5 is an integrated stereo amplifier. However, to dismiss it as "just an amp" would be like calling the Eiffel Tower "just a radio mast." Released in the early 2000s as the successor to the acclaimed Atoll 100 series, the 3.5 sits in a sweet spot of the company’s lineage. It is a full-fledged, Class AB integrated amplifier delivering a conservative yet robust 80 Watts per channel into 8 ohms (and nearly double into 4 ohms).
But the number "3.5" tells a deeper story. Atoll’s naming convention is famously straightforward: the first digit indicates the chassis size and series generation. The "3" series represents a mid-to-large chassis with a substantial power supply, while the ".5" denotes a specific revision or feature set. Over time, "Atoll 3.5" has become shorthand for a specific era of French engineering—an era where component quality mattered more than marketing budgets. Atoll 3
The default SPM coefficients are rarely accurate for your specific terrain/clutter. For best results:
To build a system around the Atoll 3.5 in 2026, you need to play to its strengths.
The discussion around Atoll 3.5 brings to the forefront several critical issues: 2/3 The biggest win in 3
LinkedIn Post: Are you still managing 5G rollouts with legacy tools? 📶 Atoll 3.5 redefines RF planning with enhanced beamforming simulation and a streamlined UI. See how the latest iteration handles the complexity of multi-layer network architecture without slowing down your workflow. #Telecommunications #RFEngineering #5G #NetworkPlanning #Atoll
Twitter/X Thread: 1/3 Optimizing network capacity? Here is why Atoll 3.5 is the go-to tool for RF Engineers in 2024:
2/3 The biggest win in 3.5 is the UI update. Less time navigating menus = more time optimizing coverage maps. A necessary upgrade for teams handling high-density urban sectors.
3/3 Read our full technical breakdown of the 3.5 release here: [Link]
The 3.5 update brought significant optimizations to the Maplink module, which used live drive-test and Automatic Cell ID (UCID) data to calibrate predictions. The algorithm for "Ray Tracing" in urban canyons saw a 15% improvement in accuracy compared to version 3.2, particularly for indoor propagation.